Page 5; Setup for protecting guitar from soldering:
THESE CUSTOMER INFORMATION PAGES ARE UNDER CONSTRUCTION
Bring 2 sheets of aluminum foil together, fold a corner of each triangular, then roll and mash the corners together to wind up with 1 joined sheet surrounding the work to be done; Making sure the foil fully covers the work cavity.
Old switch casing ready to be unsoldered and unbolted:
My old trusty soldering jig would hold any stubborn wires into place for soldering; But didn't need it even once on this job. (Yep, ...old trusty faithful tools have soul ! ):